whenever i open a DVD in my Sony DVD writer.....i usually see a message

"Windows can not read from the disk.The disk might be corrupted,or it could be using a format that is not compatible with windows."

After clicking on properties in right-click context menu.....it shows File system : RAW

But when i open that DVD in ISO buster...then i can see all the data in it.
And when i opened that DVD in aother DVD-ROM...i could see all the data.

then i attached my faulty DVD-ROM to another system.....then again the same problem existed in that system but in my PC, with a new DVD ROM...i could see all the data.


What could be the possible defect in my DVD-ROM??If there is so...how could ISO buster read all the data....